Our house was recently robbed and the PS4 was one of those stolen. It was activated as the primary console. Now I've gotten a replacement PS4 and cannot activate it as my primary console. Going to the link: https://support.us.playstation.com/app/answers/det
Welcome to the Playstation Forums.
Really sorry to hear about that.
You can deactivate it online.
Then select [Deactivate All] under [Account] > [Media and Devices] for the type of content for which you want to deactivate all activated systems.